【摘要】 以过硫酸钾 (KPS)为引发剂 ,将丙烯酸丁酯 (BA)接枝到聚乙烯醇 (PVA)上 ,制得两亲性接枝共聚物 PVA-g-PBA。用红外光谱、X射线衍射表征了接枝物 ,研究了引发剂浓度、单体浓度及反应时间对单体转化率、接枝率和接枝效率和接枝率对共聚物吸水性能的影响。结果表明在水介质中 ,氮气保护下 ,70℃时 ,以过硫酸钾 (KPS)为引发剂 ,将丙烯酸丁酯 (BA)接枝到聚乙烯醇 (PVA)上 ,[PVA]为 2 .5× 1 0 -4mol/ L,[BA]为 0 .63 mol/ L、[KPS]为 5 .5 5× 1 0 -4时 ,反应 5 h,能获得较高 CM、G和 Ge的接枝物。接枝物的接枝率越高 ,吸水率越低 ,吸水 1 0 h达平衡 ,最大平衡吸水率为 1 88.8%。更多还原

【Abstract】 A amphiphilic graft copolymer PVA-g-PBA was prepared by grafting Butyl Acrylate (BA) onto Poly(vinyl alcohol) (PVA) with Potassium Persulfate (KPS) as initiator under N2 in aqueous medium at 70℃. The formation of graft copolymer was confirmed by means of IR, XRD. The influences of initiator , concentration, monomer concentration and reaction time on the percentage of monomer conversion, grafting and grafting efficiency have been discussed. The water-absorbent behabiors of graft copolymer also studied.更多还原